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Commitments and Contingencies (Narrative) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Commitments and Contingencies [Line Items] |  |  |
Rent expense under operating lease agreements | $ 21,500,000 | $ 20,300,000 | $ 17,900,000
Percentage of royalty on net product sales range, minimum | 1.00% |  |
Percentage of royalty on net product sales range, maximum | 25.00% |  |
Accrued royalties | 17,600,000 | 25,659,000 |
Royalty expense related to agreements | 52,500,000 | 43,300,000 | 45,700,000
Total contingent obligation | 134,200,000 |  |
Contingent Cash Payments To Be Made In Next Twelve Months | 18,900,000 |  |
Additional contingent cash payments to be made in 2014 | 23,400,000 |  |
Additional contingent cash payments to be made in 2015 | 16,300,000 |  |
Additional contingent cash payments to be made in 2016 | 17,500,000 |  |
Additional contingent cash payments to be made in 2017 | 7,000,000 |  |
Additional Contingent Cash Payments To Be Made From Current Until Fifth Year | 51,100,000 |  |
Fair value of contingent consideration | 19,000,000 |  |
Commitment under employment contract agreements | 15,300,000 |  |
Amounts held in escrow in connection with acquisitions | 7,521,000 | 7,026,000 |
Preacquisition contingencies included in accrued and other liabilities | 5,493,000 | 6,203,000 |
Accrued Liabilities [Member] |  |  |
Commitments and Contingencies [Line Items] |  |  |
Accrued Contingent Obligation | 9,800,000 |  |
Other Liabilities [Member] |  |  |
Commitments and Contingencies [Line Items] |  |  |
Accrued Contingent Obligation | $ 9,200,000 |  |

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